Spindle-stop-drive for textile spindles



wmwz

Dec 22, 1970 H. P. STAUFERT SPINDLE-STOP-DRIVE FOR TEXTILE SPINDLES Filed Nov. 25, 1968 1970 H. P. STAUFERT SPINDLE-STOP-DRIVE FOR TEXTILE SPINDLES Filed Nov. 25, 1968 4 Sheets-Sheet s mm m! my 1 mum Fi/l/ I m fr e/ww/ 5/074??? Dec. 22," 1970 Filed Nov. 25, 1968 H. P. STAUFERT 5 5 SPINDLE-STOP-DRIVE FOR TEXTILE SPINDLES 4 Sheets-Sheet 4- m WWW. M fi/wfl/f United States Patent US. CI. 57-88 v 9 Claims ABSTRACT OF THE DISCLOSURE A drive for spinning and twisting spindles, which includes at least one pulley unit having a rotatable member adapted to be drivingly connected to driving means and also having a transmission stop pulley operable selectively to establish or interrupt driving connection between said rotatable member and a spindle and to stop the latter when said driving connection is interrupted.

The present invention relates to a drive for spinning or twisting spindles with separate spidnle-stopping device.

For better exploiting spinning and twisting machines, it has become the practice for some years to operate such machines in three shifts while during the second and third shifts little or no supervising personnel is employed.

In view of the increase in the size of the yarn bodies it is possible without difficulties to operate in three shifts and only during the daytime shift to withdraw yarn bodies and to start new ones. The stopping of the individual spindles must, however, be assured in such a way that when a thread break occurs or a disturbance occurs in the drafting or delivery mechanism it will be possible to stop the particular spindle without difficulty over a period of hours.

This requirement, however, requires considerable machinery which is economically not permissible or is possible only when considerable changes in the spindle are effected. Such spindle requires not only a heavier structure than would be necessary for the yarn body load, but is also too expensive with regard to cost and operation, and especially with regard to servicing. Above all, the necessary bearings for the loose whorl and also the braking units are expensive and liable to disorder and result in considerably greater dimensions of the spindle than would normally be necessary.

It is, therefore, an object of the present invention to provide a drive for spinning or twisting spindles with a separate spindle stopping device which will overcome the above mentioned drawbacks.

It is another object of this invention to provide a drive for spinning or twisting spindles, as set forth in the preceding paragraph, which will improve the spindle-stopdrive by making it safer in operation and permitting a more economical production thereof.

It is still another object of this invention to provide a spindle drive and stop arrangement of the type involved which will be better protected against damage and fly.

These and other objects and advantages of the present invention will appear more clearly from the following specification in connection with the accompanying drawings, in which:

FIG. 1 is a perspective view of a firmly mounted ordinary spindle with a spindle-stop-drive according to the present invention.

FIG. 2 shows the same arrangement as FIG. 1, but partially in section.

FIG. 3 is a section similar to that of FIG. 2 and differs therefrom merely in the employment of a belt of circular cross section instead of a flat belt.

FIG. 4 shows a spindle-stop-drive according to the invention, partially in section, with a mechanical stop arrangement of the invention.

FIG. 5 is an arrangement similar to that of FIG. 4, but differing therefrom in that the stopping part is arranged above the drive.

FIG. 6 diagrammatically shows a spindle-stop-drive arrangement according to the invention in the form of a group with long belt and central roller.

FIG. 7 is a spindle-stop-drive in group arrangement with central drive and gear tranmsission to the stopdrive units.

FIG. 8 shows in view, and partially in section, a driving group with central drive similar to that of FIG. 7, but with a short belt for the spindle-stop-drives.

FIG. 9 shows a group of spindle-stop-drives with a drive by means of cross belts.

The spindle drive according to the present invention for spinning or twisting spindles with driving rollers along the spinning or twisting machine is characterized primarily in that said driving rollers are designed as double rollers while that one of said rollers, which is intended for the drive of the spindle, forms a stop-roller. This combination, separate spindle drive with stopping mechanism, henceforth called spindle-stop-drive has the great advantage that it is safer in operation and can be produced at lower cost, inasmuch as it is no longer dependent on spindle dimensions and movement. Furthermore, the said spindle-stop-drive is better protected against fly inasmuch as it is arranged in spaced relationship to the spindles or the spinning or twisting process.

The drive of the spindle by the said spindle-stop-drive may be efiected in conformity with the requirements by an endless belt, a profiled belt, round belts, or cords, etc. and may be provided selectively for each spindle individually or simultaneously for a plurality of spindles. The stopping of the stop portion of the said spindle-stopdrive may be effected mechanically, electromagnetically, or by combined devices, i.e. mechanically and electromagnetically.

According to a further feature of the invention the spindle-stop-drive may be arranged in groups of two or more units and may be driven, for instance, by a long belt resting against an intermediate pulley.

Instead of a long belt, such drive group or the units thereof may be driven by a centrally arranged driving roller or by an electric motor in cooperation with belts, gears, or the like.

The drive of the spindle-stop-drive units may within the framework of the present invention also be effected by cross belts or cords or the like by means of a drum or a pulley for two units or four units.

The present invention furthermore permits the combination of spindle-stop-drive nuts with their driving elements to finished structural units for all occurring spindle spacing and machine types. It is merely necessary to adapt the spindle driving belts or the like to the respective dimensions.

Referring now to the drawings, and FIGS. 1 and 2 thereof in particular, the arrangement shown in FIG. 1 comprises an ordinary spindle 1 which is firmly mounted in the spindle rail 2. In spaced relationship to said spindle 1, and toward the center of the machine there is provided on a plate 4 a separate spindle drive with a stopping device 3. This separate spindle drive comprises a driving roller or pulley 5 and a second roller or pulley 6, which is adapted by means of a short spindle belt 7 to drive the spindle 1. The said roller 6 is adapted selectively to 3 be stopped. Below said stop-roller 6 there is provided an electromagnet 8 which may be energized in any convenient manner, e.g. by a switch (not shown) or in response to the pressing of a push button 9, whereby the stop roller 6 is disengaged from the drive roller and is braked.

As will be evident from FIG. 2, the electromagnet 8 rests on plate 4 and is held in its position by the bolt and ring 11. The drive roller 5 is journalled on a ball bearing 12. The stop roller 6 for the spindle drive is likewise journalled on bolt or pivot 10 and in its interior has a ball bearing 13 which is axially movable through the intervention of a bushing 14 and a helical coil 15. The stop-roller 6 due to said spring 15 rests against the lower marginal area of the drive roller 5 so as to be rotated together therewith. If desired, friction lining 16 may be provided on either the stop roller 6, as shown, or on the respective adjacent marginal area of the drive roller 5. For further aiding in the rotation of the stop roller 6 by the drive roller 5, centrifugal elements 17 may be employed which are circumferentially distributed in pockets 18 in said stop roller 6.

When the electromagnet 8 is energized, the stop roller 6 is withdrawn from the drive roller 5 and is pressed against braking surfaces 19 formed, for instance, by friction brake lining material, so that the roller 6, the spindle belt, and simultaneously the spindle are stopped. When de-energizing the electromagnet 8, the stop roller 6 is disengaged from the braking surfaces 19 and by means of spring 15 is again pressed against the drive roller 5 for frictional engagement with and rotation by said drive roller 5. As soon as frictional engagement has been established between the stop roller 6 and the drive roller 5, the fly weights become effective and aid in the coupling between the members 6 and 5 and thereby in the rotation of the spindle 1.

FIG. 3 shows the same arrangement as FIG. 2 with the exception that the spindle drive belt 7 of FIG. 2 has been replaced by a profiled or round belt or cord 20.

FIG. 4 illustrates a spindle-stop-drive smilar to that of FIGS. 2 and 3, but differing therefrom in that the electromagnet 8 of FIG. 2 has been replaced by a mechanical stopping device. This mechanical stopping device comprises a lever 21 which engages a bushing 22 connected to the stop roller 6, and is adapted to press the stop roller 6 against the braking surface 19 in a manner similar to that described above for stopping the spindle. The operation of this arrangement is equivalent to the above described device with the electromagnet 8.

Referring now to FIG. 5, also with the arrangement shown therein, the stop roller 6 is adapted mechanically to be connected to and disengaged from the drive roller 5. With this embodiment, the drive roller 5 is arranged below the stop roller 6. The coupling between the stop roller 6 and drive roller 5 is eifetced by a cone 23 and a bushing 24, which latter has a stabilizing surface 25. By moving lever 26, the cone 23 may be disengaged from bushing 24 while the discs 27 and 28 with brake liner 29 are lifted. The surface 25 is simultaneously, by means of the stop roller 6, pressed against a stationary surface 30 whereby the stop roller 6 and consequently the spindle is brought to a standstill, whereas the drive roller 5 continues to rotate. When lever 26 is actuated in opposite direction, bushing 24 with stop roiler 6 is again moved downwardly and the cone 23 is coupled to the drive roller 5.

FIG. 6 shows a combination of a plurality of stop drive units by means of a plate 4 so that a structural unit is formed. The drive of these units is effected by longitudinal belt 31 which simultaneously rests against a central roller 32.

FIG. 7 illustrates partly in section, the arrangement of spindle-stop-drive units. The arrangement in this instance is such that a centrally located electric motor 33, by means of gears 34 and 35, drives the spindle-stop-drive units. Instead of the drive roller 5, in this instance, a friction disc 36 with friction lining 37 is provided. Friction disc 36 is keyed to a shaft 10a which in its turn is keyed to pinion 35. The rotation of the stop roller 6 is effected, as with the preceding embodiments, by spring pressure, but without additional centrifugal force. The engagement of the stop roller 6 with, or disengagement from the friction disc 36 is effected in a manner similar to that described above in connection with the electromagnet 8 and drive roller 5.

Similar to FIGS. 6 and 7, also in FIG. 8 the drive of the spindle-stop-drive units is effected by means of a centrally arranged roller 38 and belts 39. Roller 38 may be driven mechanically or by a rotating motor, the mantle surface of which simultaneously forms the central roller.

Finally, with regard to FIG. 9, this figure shows a drive for spindle-stop-drive units by means of drums or pulleys 40. By correspondingly crossing the belts 41, it is possible to drive individual spindle-stop-drive units or a plurality of spindle-stop-drive units.

It is, of course, to be understood that the present invention is not limited to the specific embodiments shown in the drawings, but also comprises modifications within the scope of the appended claims.

What I claim is:

1. A drive for spinning and twisting spindles, which includes at least one pulled unit comprising: stationary means, a rotatable member adapted to be connected to driving means, and a transmission-stop pulley adapted drivingly to be connected to a spindle to be driven and selectively movable to a first position into driving connection with said rotatable member for transmitting rotary movement from said rotatable member to the spindle to be driven thereby and also movable to a second position into non-rotative engagement with said stationary means to interrupt driving connection with said rotatable member and to engage said stationary means in order to be stopped by said stationary means to thereby stop the spindle normally to be driven by said transmission-stop pulley.

2. A drive according to claim 1, in which each pulley unit includes actuating means operatively connected to the stationary means for selectively moving the said stop pulley from said first position to said second position and vice versa.

3. A drive according to claim 2, in which said actuating means includes electromagnetic means.

4. A drive according to claim 2, in which said actuating means includes mechanical means.

5. A drive according to claim 1, in which the rotatable member is formed by a drive pulley, and in which the drive pulley and the transmission-stop pulley pertaining to one and the same pulley unit are coaxially arranged with regard to each other while one of said two pulleys is located above the other one.

6. A drive according to claim 5, which includes a plurality of pulley units, and driving means common to said plurality of pulley units and drivingly connected thereto.

7. A drive according to claim 6, which includes two groups of two pulley units each, said group being substantially parallel to each other so that the pulleys of said groups define a rectangle, master drive means centrally arranged with regard to all of the drive pulleys of said pulley units, and two endless driving belts respectively drivingly engaging opposite sides of said master drive means while one of said belts drivingly engages the drive pulleys of one of said pulley units and the other one of said belts drivingly engages the drive pulleys of the other pulley unit.

8. A drive according to claim 1, which includes a plurality of pulley units, and also includes driving means centrally located with regard to the rotatable members of said plurality of pulley units, said driving means including gear means drivingly connected to the rotatable member of each of said pulley units.

6 9. A drive according to claim 8, in which said rotat- 3,224,180 12/1965 Graf 57-88 able members are formed by friction disc means. 3,256,684 6/ 1966 Stahlecker et a] 57105X References Cited JOHN PETRAKES, Primary Examiner UNITED STATES PATENTS 5 S l XR 3,141,288 7/1964 Carroll 5788 3,166,882 1/1965 Stahlecker 57105X 57-104 

